[mosta]

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Suppose you open the envelop and there is 20 dollars in it.
So in the other envelop there is either 10 dollars or 40 dollars.


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I'd say: as soon as you say this, realize it's a mistake, a contradiction, and "erase" your statement. Seeing one envelop tells you nothing about the other. But some people who probably know what they're doing don't think that's enough to say.

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I feel like the monkey that has trapped himself by holding on to the banana. [img]/images/graemlins/confused.gif[/img]

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This is a really great line.